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Identifying the Potential Impacts of Climate Change on Streamflow in a Humid Tropical Basin
https://orcid.org/http://orcid.org/0000-0003-1577-5792
The preservation of ecosystems in a river is based upon the replication of its original pristine conditions in the river regime. One of the main variables influencing a region’s hydrology is climate change. The research investigated the impact of climate change on the streamflow within the Meenachil River basin located in Kerala, India. The present study employed the Soil and Water Assessment Tool (SWAT) model to simulate the hydrological processes of the basin. The calibration and validation of the model are done, and the model performance is determined considering the Nash Sutcliffe Efficiency (NSE), coefficient of determination (R2), and percentage bias (PBIAS), and it is observed to be good. The data for the future climate are taken from National Aeronautics and Space Administration (NASA) Earth Exchange Global Daily Downscaled Projections (NEX-GDDP) data for Representative Concentration Pathway (RCP) 4.5. The response of streamflow to the climate in the future time period (2025–2099) is evaluated by considering three scenarios, S1, S2, and S3, with reference to a baseline scenario. In order to analyze the impact of climate change in the basin, the high and low flow indices (Q5 and Q95) of the scenarios under consideration are established using the flow duration curve of annual streamflow. Q5 showed a reduction of 20, 8.3, and 1.6% for the considered scenarios compared to the baseline period. The low flow index, Q95, showed an increase of 9.8, 15.3, and 15.1% in the scenarios concerning the baseline period. The findings of the present study will aid in developing adaption techniques for improved basin-wide management of water resources.
Identifying the Potential Impacts of Climate Change on Streamflow in a Humid Tropical Basin
https://orcid.org/http://orcid.org/0000-0003-1577-5792
The preservation of ecosystems in a river is based upon the replication of its original pristine conditions in the river regime. One of the main variables influencing a region’s hydrology is climate change. The research investigated the impact of climate change on the streamflow within the Meenachil River basin located in Kerala, India. The present study employed the Soil and Water Assessment Tool (SWAT) model to simulate the hydrological processes of the basin. The calibration and validation of the model are done, and the model performance is determined considering the Nash Sutcliffe Efficiency (NSE), coefficient of determination (R2), and percentage bias (PBIAS), and it is observed to be good. The data for the future climate are taken from National Aeronautics and Space Administration (NASA) Earth Exchange Global Daily Downscaled Projections (NEX-GDDP) data for Representative Concentration Pathway (RCP) 4.5. The response of streamflow to the climate in the future time period (2025–2099) is evaluated by considering three scenarios, S1, S2, and S3, with reference to a baseline scenario. In order to analyze the impact of climate change in the basin, the high and low flow indices (Q5 and Q95) of the scenarios under consideration are established using the flow duration curve of annual streamflow. Q5 showed a reduction of 20, 8.3, and 1.6% for the considered scenarios compared to the baseline period. The low flow index, Q95, showed an increase of 9.8, 15.3, and 15.1% in the scenarios concerning the baseline period. The findings of the present study will aid in developing adaption techniques for improved basin-wide management of water resources.
Identifying the Potential Impacts of Climate Change on Streamflow in a Humid Tropical Basin
https://orcid.org/http://orcid.org/0000-0003-1577-5792
The preservation of ecosystems in a river is based upon the replication of its original pristine conditions in the river regime. One of the main variables influencing a region’s hydrology is climate change. The research investigated the impact of climate change on the streamflow within the Meenachil River basin located in Kerala, India. The present study employed the Soil and Water Assessment Tool (SWAT) model to simulate the hydrological processes of the basin. The calibration and validation of the model are done, and the model performance is determined considering the Nash Sutcliffe Efficiency (NSE), coefficient of determination (R2), and percentage bias (PBIAS), and it is observed to be good. The data for the future climate are taken from National Aeronautics and Space Administration (NASA) Earth Exchange Global Daily Downscaled Projections (NEX-GDDP) data for Representative Concentration Pathway (RCP) 4.5. The response of streamflow to the climate in the future time period (2025–2099) is evaluated by considering three scenarios, S1, S2, and S3, with reference to a baseline scenario. In order to analyze the impact of climate change in the basin, the high and low flow indices (Q5 and Q95) of the scenarios under consideration are established using the flow duration curve of annual streamflow. Q5 showed a reduction of 20, 8.3, and 1.6% for the considered scenarios compared to the baseline period. The low flow index, Q95, showed an increase of 9.8, 15.3, and 15.1% in the scenarios concerning the baseline period. The findings of the present study will aid in developing adaption techniques for improved basin-wide management of water resources.
Identifying the Potential Impacts of Climate Change on Streamflow in a Humid Tropical Basin
Lecture Notes in Civil Engineering
Dutta, Subashisa (editor) / Chembolu, Vinay (editor) / Abraham, Alka (author) / Kundapura, Subrahmanya (author)
International Conference on River Corridor Research and Management ; 2022
2023-08-18
13 pages
Article/Chapter (Book)
Electronic Resource
English
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